Donatien Garnier
ZG2100 Network interface source
drv/zg2100/zg_net.c@0:b802fc31f1db, 2010-07-09 (annotated)
- Committer:
- donatien
- Date:
- Fri Jul 09 15:37:23 2010 +0000
- Revision:
- 0:b802fc31f1db
- Child:
- 1:3a7c15057192
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| donatien | 0:b802fc31f1db | 1 | |
| donatien | 0:b802fc31f1db | 2 | /* |
| donatien | 0:b802fc31f1db | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| donatien | 0:b802fc31f1db | 4 | |
| donatien | 0:b802fc31f1db | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| donatien | 0:b802fc31f1db | 6 | of this software and associated documentation files (the "Software"), to deal |
| donatien | 0:b802fc31f1db | 7 | in the Software without restriction, including without limitation the rights |
| donatien | 0:b802fc31f1db | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| donatien | 0:b802fc31f1db | 9 | copies of the Software, and to permit persons to whom the Software is |
| donatien | 0:b802fc31f1db | 10 | furnished to do so, subject to the following conditions: |
| donatien | 0:b802fc31f1db | 11 | |
| donatien | 0:b802fc31f1db | 12 | The above copyright notice and this permission notice shall be included in |
| donatien | 0:b802fc31f1db | 13 | all copies or substantial portions of the Software. |
| donatien | 0:b802fc31f1db | 14 | |
| donatien | 0:b802fc31f1db | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| donatien | 0:b802fc31f1db | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| donatien | 0:b802fc31f1db | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| donatien | 0:b802fc31f1db | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| donatien | 0:b802fc31f1db | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| donatien | 0:b802fc31f1db | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| donatien | 0:b802fc31f1db | 21 | THE SOFTWARE. |
| donatien | 0:b802fc31f1db | 22 | */ |
| donatien | 0:b802fc31f1db | 23 | |
| donatien | 0:b802fc31f1db | 24 | #include "netCfg.h" |
| donatien | 0:b802fc31f1db | 25 | #if NET_ZG2100 |
| donatien | 0:b802fc31f1db | 26 | |
| donatien | 0:b802fc31f1db | 27 | #include "zg_defs.h" |
| donatien | 0:b802fc31f1db | 28 | #include "zg_net.h" |
| donatien | 0:b802fc31f1db | 29 | #include "zg_drv.h" |
| donatien | 0:b802fc31f1db | 30 | |
| donatien | 0:b802fc31f1db | 31 | #include "lwip/opt.h" |
| donatien | 0:b802fc31f1db | 32 | |
| donatien | 0:b802fc31f1db | 33 | #include "lwip/def.h" |
| donatien | 0:b802fc31f1db | 34 | #include "lwip/pbuf.h" |
| donatien | 0:b802fc31f1db | 35 | #include "lwip/sys.h" |
| donatien | 0:b802fc31f1db | 36 | #include "lwip/stats.h" |
| donatien | 0:b802fc31f1db | 37 | #include "netif/etharp.h" |
| donatien | 0:b802fc31f1db | 38 | |
| donatien | 0:b802fc31f1db | 39 | #include "string.h" |
| donatien | 0:b802fc31f1db | 40 | |
| donatien | 0:b802fc31f1db | 41 | //#define __DEBUG |
| donatien | 0:b802fc31f1db | 42 | #include "dbg/dbg.h" |
| donatien | 0:b802fc31f1db | 43 | |
| donatien | 0:b802fc31f1db | 44 | #define IFNAME0 'w' |
| donatien | 0:b802fc31f1db | 45 | #define IFNAME1 'l' |
| donatien | 0:b802fc31f1db | 46 | |
| donatien | 0:b802fc31f1db | 47 | //void hexdump(byte* buffer, int size); |
| donatien | 0:b802fc31f1db | 48 | |
| donatien | 0:b802fc31f1db | 49 | const char snap[ZG_SNAP_LEN] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x00 }; //Snap word, see IEEE 802-2001 10.3 Subnetwork Access Protocol (p. 23 ~ 29) |
| donatien | 0:b802fc31f1db | 50 | struct netif* zg_netif; |
| donatien | 0:b802fc31f1db | 51 | |
| donatien | 0:b802fc31f1db | 52 | //To be called by Lwip |
| donatien | 0:b802fc31f1db | 53 | static err_t zg_output(struct netif *netif, struct pbuf *p) //Transfer an ethernet frame : convert into ZG frame & TX it |
| donatien | 0:b802fc31f1db | 54 | { |
| donatien | 0:b802fc31f1db | 55 | // DBG("\r\nOut packet\r\n"); |
| donatien | 0:b802fc31f1db | 56 | |
| donatien | 0:b802fc31f1db | 57 | while( zg_send_is_busy() ) |
| donatien | 0:b802fc31f1db | 58 | { |
| donatien | 0:b802fc31f1db | 59 | zg_process(); //Ugly but prevents lwip from feeding other packets |
| donatien | 0:b802fc31f1db | 60 | } |
| donatien | 0:b802fc31f1db | 61 | #if ETH_PAD_SIZE |
| donatien | 0:b802fc31f1db | 62 | pbuf_header(p, -ETH_PAD_SIZE); //Drop padding word |
| donatien | 0:b802fc31f1db | 63 | #endif |
| donatien | 0:b802fc31f1db | 64 | |
| donatien | 0:b802fc31f1db | 65 | ZG_ETH_HDR* eth_hdr = (ZG_ETH_HDR*) p->payload; |
| donatien | 0:b802fc31f1db | 66 | |
| donatien | 0:b802fc31f1db | 67 | ZG_TX_HDR* tx_hdr = (ZG_TX_HDR*)fifo_buf; |
| donatien | 0:b802fc31f1db | 68 | memset((void*)tx_hdr, 0, sizeof(ZG_TX_HDR)); |
| donatien | 0:b802fc31f1db | 69 | |
| donatien | 0:b802fc31f1db | 70 | //Convert headers properly |
| donatien | 0:b802fc31f1db | 71 | tx_hdr->zero = HTODS( 0 ); |
| donatien | 0:b802fc31f1db | 72 | memcpy( tx_hdr->dest, eth_hdr->dest, ZG_MACADDR_LEN ); |
| donatien | 0:b802fc31f1db | 73 | memcpy( tx_hdr->snap, snap, ZG_SNAP_LEN ); |
| donatien | 0:b802fc31f1db | 74 | tx_hdr->type = eth_hdr->type; //Lwip as already put the type in BE |
| donatien | 0:b802fc31f1db | 75 | |
| donatien | 0:b802fc31f1db | 76 | //DBG("\r\nEth header\r\n"); |
| donatien | 0:b802fc31f1db | 77 | //hexdump((byte*)eth_hdr, sizeof(ZG_ETH_HDR)); |
| donatien | 0:b802fc31f1db | 78 | |
| donatien | 0:b802fc31f1db | 79 | //DBG("\r\nZg header\r\n"); |
| donatien | 0:b802fc31f1db | 80 | //hexdump((byte*)tx_hdr, sizeof(ZG_TX_HDR)); |
| donatien | 0:b802fc31f1db | 81 | |
| donatien | 0:b802fc31f1db | 82 | //Open TX fifo & send header |
| donatien | 0:b802fc31f1db | 83 | zg_send_start(); |
| donatien | 0:b802fc31f1db | 84 | zg_send( (byte*)tx_hdr, sizeof(ZG_TX_HDR) ); |
| donatien | 0:b802fc31f1db | 85 | |
| donatien | 0:b802fc31f1db | 86 | //Send remaining payload of this buf |
| donatien | 0:b802fc31f1db | 87 | zg_send( (byte*)(((byte*)p->payload) + sizeof(ZG_ETH_HDR)), (p->len - sizeof(ZG_ETH_HDR)) ); |
| donatien | 0:b802fc31f1db | 88 | |
| donatien | 0:b802fc31f1db | 89 | while(p->next != NULL) |
| donatien | 0:b802fc31f1db | 90 | { |
| donatien | 0:b802fc31f1db | 91 | p = p->next; |
| donatien | 0:b802fc31f1db | 92 | zg_send((byte*)p->payload, p->len); |
| donatien | 0:b802fc31f1db | 93 | } |
| donatien | 0:b802fc31f1db | 94 | |
| donatien | 0:b802fc31f1db | 95 | zg_send_end(); |
| donatien | 0:b802fc31f1db | 96 | |
| donatien | 0:b802fc31f1db | 97 | #if ETH_PAD_SIZE |
| donatien | 0:b802fc31f1db | 98 | pbuf_header(p, ETH_PAD_SIZE); //Reclaim padding word |
| donatien | 0:b802fc31f1db | 99 | #endif |
| donatien | 0:b802fc31f1db | 100 | |
| donatien | 0:b802fc31f1db | 101 | LINK_STATS_INC(link.xmit); |
| donatien | 0:b802fc31f1db | 102 | return ERR_OK; |
| donatien | 0:b802fc31f1db | 103 | } |
| donatien | 0:b802fc31f1db | 104 | |
| donatien | 0:b802fc31f1db | 105 | //Callback from zg_drv |
| donatien | 0:b802fc31f1db | 106 | void zg_on_input(byte* buf, int len) //On reception of a ZG frame : convert into Eth frame & feed lwip |
| donatien | 0:b802fc31f1db | 107 | { |
| donatien | 0:b802fc31f1db | 108 | struct pbuf *frame, *p; //Lwip buffers |
| donatien | 0:b802fc31f1db | 109 | byte* eth_buf; //Position of the Ethernet packet buffer |
| donatien | 0:b802fc31f1db | 110 | int eth_len; //Length of this buffer |
| donatien | 0:b802fc31f1db | 111 | ZG_ETH_HDR eth_hdr_data; //Temporary buffer |
| donatien | 0:b802fc31f1db | 112 | ZG_ETH_HDR* eth_hdr = ð_hdr_data; //just to remain consistent in notations |
| donatien | 0:b802fc31f1db | 113 | memset((void*)eth_hdr, 0, sizeof(ZG_ETH_HDR)); |
| donatien | 0:b802fc31f1db | 114 | |
| donatien | 0:b802fc31f1db | 115 | //DBG("\r\nIncoming packet\r\n"); |
| donatien | 0:b802fc31f1db | 116 | //hexdump(buf, len); |
| donatien | 0:b802fc31f1db | 117 | |
| donatien | 0:b802fc31f1db | 118 | ZG_RX_HDR* rx_hdr = (ZG_RX_HDR*)buf; |
| donatien | 0:b802fc31f1db | 119 | |
| donatien | 0:b802fc31f1db | 120 | memcpy( eth_hdr->dest, rx_hdr->dest, ZG_MACADDR_LEN ); |
| donatien | 0:b802fc31f1db | 121 | memcpy( eth_hdr->src, rx_hdr->src, ZG_MACADDR_LEN ); |
| donatien | 0:b802fc31f1db | 122 | eth_hdr->type = rx_hdr->type; //Lwip will convert the type in LE |
| donatien | 0:b802fc31f1db | 123 | |
| donatien | 0:b802fc31f1db | 124 | //DBG("\r\nZg header\r\n"); |
| donatien | 0:b802fc31f1db | 125 | //hexdump((byte*)rx_hdr, sizeof(ZG_RX_HDR)); |
| donatien | 0:b802fc31f1db | 126 | |
| donatien | 0:b802fc31f1db | 127 | //DBG("\r\nEth header\r\n"); |
| donatien | 0:b802fc31f1db | 128 | //hexdump((byte*)eth_hdr, sizeof(ZG_ETH_HDR)); |
| donatien | 0:b802fc31f1db | 129 | |
| donatien | 0:b802fc31f1db | 130 | //Since the ZG_ETH_HDR header is smaller than the ZG_RX_HDR one, we can copy the new header before the payload to get a full ethernet packet |
| donatien | 0:b802fc31f1db | 131 | eth_buf = buf + sizeof(ZG_RX_HDR) - sizeof(ZG_ETH_HDR); |
| donatien | 0:b802fc31f1db | 132 | eth_len = len - sizeof(ZG_RX_HDR) + sizeof(ZG_ETH_HDR); |
| donatien | 0:b802fc31f1db | 133 | memcpy( eth_buf, (void*)eth_hdr, sizeof(ZG_ETH_HDR) ); |
| donatien | 0:b802fc31f1db | 134 | |
| donatien | 0:b802fc31f1db | 135 | //Filter on packet type |
| donatien | 0:b802fc31f1db | 136 | |
| donatien | 0:b802fc31f1db | 137 | switch (htons(eth_hdr->type)) { |
| donatien | 0:b802fc31f1db | 138 | //IP or ARP packet |
| donatien | 0:b802fc31f1db | 139 | case ETHTYPE_IP: |
| donatien | 0:b802fc31f1db | 140 | case ETHTYPE_ARP: |
| donatien | 0:b802fc31f1db | 141 | break; //OK |
| donatien | 0:b802fc31f1db | 142 | default: |
| donatien | 0:b802fc31f1db | 143 | return; //We do not know how to handle this |
| donatien | 0:b802fc31f1db | 144 | } |
| donatien | 0:b802fc31f1db | 145 | |
| donatien | 0:b802fc31f1db | 146 | //Now we can pass this nice ethnernet packet to lwip |
| donatien | 0:b802fc31f1db | 147 | //Allocate a buffer |
| donatien | 0:b802fc31f1db | 148 | frame = pbuf_alloc(PBUF_RAW, eth_len, PBUF_POOL); |
| donatien | 0:b802fc31f1db | 149 | if(frame == NULL) |
| donatien | 0:b802fc31f1db | 150 | { |
| donatien | 0:b802fc31f1db | 151 | //Out of memory |
| donatien | 0:b802fc31f1db | 152 | return; |
| donatien | 0:b802fc31f1db | 153 | } |
| donatien | 0:b802fc31f1db | 154 | p = frame; |
| donatien | 0:b802fc31f1db | 155 | |
| donatien | 0:b802fc31f1db | 156 | //Copy buffer into lwip memory pool |
| donatien | 0:b802fc31f1db | 157 | while( eth_len > 0 ) |
| donatien | 0:b802fc31f1db | 158 | { |
| donatien | 0:b802fc31f1db | 159 | memcpy(p->payload, eth_buf, p->len); |
| donatien | 0:b802fc31f1db | 160 | eth_buf += p->len; |
| donatien | 0:b802fc31f1db | 161 | eth_len -= p->len; |
| donatien | 0:b802fc31f1db | 162 | p = p->next; |
| donatien | 0:b802fc31f1db | 163 | if( p == NULL ) |
| donatien | 0:b802fc31f1db | 164 | { |
| donatien | 0:b802fc31f1db | 165 | //Should not happen |
| donatien | 0:b802fc31f1db | 166 | break; |
| donatien | 0:b802fc31f1db | 167 | } |
| donatien | 0:b802fc31f1db | 168 | } |
| donatien | 0:b802fc31f1db | 169 | |
| donatien | 0:b802fc31f1db | 170 | if ( ethernet_input(frame, zg_netif) != ERR_OK ) //Pass the frame to lwip |
| donatien | 0:b802fc31f1db | 171 | { |
| donatien | 0:b802fc31f1db | 172 | LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n")); |
| donatien | 0:b802fc31f1db | 173 | pbuf_free(frame); |
| donatien | 0:b802fc31f1db | 174 | frame = NULL; |
| donatien | 0:b802fc31f1db | 175 | } |
| donatien | 0:b802fc31f1db | 176 | } |
| donatien | 0:b802fc31f1db | 177 | |
| donatien | 0:b802fc31f1db | 178 | |
| donatien | 0:b802fc31f1db | 179 | err_t zg_net_init(struct netif *netif) { |
| donatien | 0:b802fc31f1db | 180 | LWIP_ASSERT("netif != NULL", (netif != NULL)); |
| donatien | 0:b802fc31f1db | 181 | |
| donatien | 0:b802fc31f1db | 182 | NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 0x2EA/*ZG_FIFO_BUF_SIZE*10*/); |
| donatien | 0:b802fc31f1db | 183 | |
| donatien | 0:b802fc31f1db | 184 | /* maximum transfer unit */ |
| donatien | 0:b802fc31f1db | 185 | netif->mtu = 0x2EA;//ZG_FIFO_BUF_SIZE; |
| donatien | 0:b802fc31f1db | 186 | |
| donatien | 0:b802fc31f1db | 187 | /* set MAC hardware address length */ |
| donatien | 0:b802fc31f1db | 188 | netif->hwaddr_len = ETHARP_HWADDR_LEN; |
| donatien | 0:b802fc31f1db | 189 | |
| donatien | 0:b802fc31f1db | 190 | /* set MAC hardware address */ |
| donatien | 0:b802fc31f1db | 191 | if( !zg_data_mask.mac_addr ) //Get MAC addr from chip if not known yet |
| donatien | 0:b802fc31f1db | 192 | { |
| donatien | 0:b802fc31f1db | 193 | zg_mgmt_get_param(ZG_FIFO_MGMT_PARM_MACAD); |
| donatien | 0:b802fc31f1db | 194 | } |
| donatien | 0:b802fc31f1db | 195 | |
| donatien | 0:b802fc31f1db | 196 | memcpy(netif->hwaddr, zg_data.mac_addr, ETHARP_HWADDR_LEN); |
| donatien | 0:b802fc31f1db | 197 | |
| donatien | 0:b802fc31f1db | 198 | /* device capabilities */ |
| donatien | 0:b802fc31f1db | 199 | /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */ |
| donatien | 0:b802fc31f1db | 200 | netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP; |
| donatien | 0:b802fc31f1db | 201 | |
| donatien | 0:b802fc31f1db | 202 | netif->state = NULL; |
| donatien | 0:b802fc31f1db | 203 | |
| donatien | 0:b802fc31f1db | 204 | netif->name[0] = IFNAME0; |
| donatien | 0:b802fc31f1db | 205 | netif->name[1] = IFNAME1; |
| donatien | 0:b802fc31f1db | 206 | |
| donatien | 0:b802fc31f1db | 207 | /* We directly use etharp_output() here to save a function call. |
| donatien | 0:b802fc31f1db | 208 | * You can instead declare your own function an call etharp_output() |
| donatien | 0:b802fc31f1db | 209 | * from it if you have to do some checks before sending (e.g. if link |
| donatien | 0:b802fc31f1db | 210 | * is available...) */ |
| donatien | 0:b802fc31f1db | 211 | netif->output = etharp_output; |
| donatien | 0:b802fc31f1db | 212 | netif->linkoutput = zg_output; |
| donatien | 0:b802fc31f1db | 213 | |
| donatien | 0:b802fc31f1db | 214 | zg_netif = netif; |
| donatien | 0:b802fc31f1db | 215 | |
| donatien | 0:b802fc31f1db | 216 | return ERR_OK; |
| donatien | 0:b802fc31f1db | 217 | } |
| donatien | 0:b802fc31f1db | 218 | |
| donatien | 0:b802fc31f1db | 219 | #endif |